Defamation of character -- how much can one sue for?
My ex and I have a house in another country and we are trying to sell it. My father is taking care of the affairs and he placed the house in a real estate agency. There is a potential buyer and the real estate needs a document from my ex in order to have the sale finalized. My ex is refusing to give this document unless I file a quit of claims and give the house all to him and later on he will write me a check with some money from the sale. Also, he wrote an email to me and my father that reads: "it is illegal in USA to charge real estate agency fees with-out an agency bureau license and a real estate agent license", in other words... he is accusing me, one more time, of something that is not true. Can I sue him for defamation of character? And is it a good idea to give to him the quit of claims?
Thank you